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medical-notes/content/Biokemi/Gamla tentor/2024-12-20/13.md
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2024-12-20
biokemi
provfråga
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Describe the main features of the genetic code and explain their biological significance. (4p) Answer in English.

Answer

The genetic code is in humans stored in DNA (23 chromosome pairs). It stems from our mother and father. The DNA contains 4 different base-pairs. Adenin, Tymin, Cytosin och Guanin. 

The genetic code is not read one base-pair at a time, but rather in groups of three (i.e codons). For example AUG, ATT. 

The genetic code is also degenarative, leading to different codons being able to code for the same aminoacid. This leads to a protective function against mutations, since a mutation in a codon can lead to the same amino acid still being coded for example. The gentic code codes for all the proteins in an organism. The DNA can be transcribed into mRNA which can be translated into proteins

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